Flier block brake



Dec. 19, 1939. w w w 2,183,756

FLIER BLOCK BRAKE Filed July 25. 1939 jy'j Inventor Patented 19, 1939 UNITED STATES PATENT. OFFICE 2,183,156 FLIER BLOCK BRAKE Wilson Woodrow Tow, Elon College, N. C. Application July 2;, i939, Serial No. 286,464

l prehended by the present invention, all of which,

together with the exact nature of my improve ment, will be readily understood when the succeeding description and claims are read with reference to the drawing accompanying and forming part of this specification.

In said. drawing:

Figure 1 is a view in side elevation of a spinner bobbin and flier block embodying my improvements,

Figure 2 is a fragmentary view in vertical section taken on the line 22 of Figure 1 looking in the directions of the arrows and drawn to an enlarged scale,

Figure 3 is a view in top plan drawn to an enlarged scale,

Figure 4 is a view in bottom plan of the friction brake 'member and lug together with the housing for said brake member, and

Figure 5 is a view in bottom plan of the friction brake member detached.

Referring to the drawing by numerals, I have shown therein my improved flier block brake as embodied in a spinner bobbin I and flier block 2 of the type featured in my aforesaid patent, the bobbin having an axial bore 3 by means of which it is frictionally fitted on the usual upwardly tapering spindle l for rotation thereby. Flier block 2 comprises a sleeve-like hub 5 surmounting the bobbin i and freely rotatable on the spindle 4, an intermediate base flange G on said sleeve, a laterally extending lug 'I on the lower end of the sleeve, and thread-guiding arms [terminating in guide eyes 9 and supported by a mounting I. on said hub for rotation therewith.

According to the instant invention, the upper end of the bobbin i has countersunk therein, concentrically thereof, a circular, open bottom housing ll of shallow cup-like form having a pressed fit in said bobbin i and provided in the top l3 thereof with an axial aperture l2 fitting loosely around the hub 5 of block 2, said-housing enclosing the lug I, and the top l3 of the housing supporting the flange G of the hub 5. The aperture l2, it will be understood, is of a diameter such that the lug 'I may be inserted therethrough by tilting the hub 5, prior to mounting the bobbin and flier block on the spindle l. I

The housing II has fitted therein a friction brake member comprising a diametrically split, thin band ll of resilient metal reacting against the side wall of the housing I l to frictionally grip the same and having a pair of inwardly extending, laterally spaced, terminal arms i5 extending upon opposite sides of the lug 1, respectively, and normally reacting against said sides to friction- 1o ally grip said lug therebetween. Preferably the arms i5 are provided with outwardly bowed, inner ends it curving in the arc of a circle eccentric to the axis of rotation of the lug l and normally clamping the lug between the same.

The operation of the described brake will be readily understood. Under rotation of the bobbin i the arms iii are thrown outwardly by the action of centrifugal force, thereby releasing the lug 1, whereby the bobbin l is free to rotate relative to the flier block 2. When the bobbin i slows down below a predetermined speed, the arms i5 react against the sides of the lug I and brake the fiie'r block 2 to a stop when the bobbin is stopped. The lug I being eccentric to the axis of rotation, likewise the ends l6 of arms IS, the result is that the band i4 is intermittently tightened against the housing ii under rotation of the flier block 2 and rotation thereof and the braking action of the arms I5 is applied with intermit- 3o tently increasing force until the flier block is stopped.

The foregoing will, it is believed, suflice to impart a clear understanding of my invention without further explanation.

Manifestly the invention, as described, is susceptible to modification without departing from the inventive concept and right is herein reserved to such modifications as fall within the scope of the subjoined claims.

What I claim is:

1. A brake for use between a spinner bobbin and a flier block, relatively rotatable about the axis of a common spindle, comprising a circular cupe housing adapted to be countersunk in fixed inverted position in the top of said bobbin concentrically of said axis, an axial sleeve adapted to extend from said block into said housing and having a radial lug thereon rotatable on said housing about said axis, and a band of flexible metal fitting in said housing, said band being diametrically split for reaction into frictional engagement with the inner circumferential wall of said housing and terminating in a pair of laterally spaced arms extending inwardly of the band upon opposite sides of the sleeve, respectively,

in the plane of rotation of said lug. said arms normally reacting toward said sleeve to frictionally engage opposite sides of said lug and brake rotation thereof and being movable outwardly under rotation of said bobbin and the action of centrifugal force away from said sleeve out of braking position.

2. A brake for use between a spinner bobbin and a flier block, relatively rotatable about the axis of a common spindle, comprising a circular cup-like housing adapted to be countersunk in fixed inverted position in thetop of said bobbin concentrically of said axis, an axial sleeve adapted to extend from said block into said housing and having a radial lug thereon rotatable on said housing about said axis, and a band of flexible rotation thereof and being movable outwardly 10 under rotation of said bobbin and the action of centrifugal force away from said sleeve out of braking position, said arms having outwardly bowed terminal ends, respectively, eccentric to said axis for intermittently varying frictional enll gagement of the arms with said lug.

WILSON WOODROW TEW. 

